px437 exoplanets
DESCRIPTION
PX437 EXOPLANETS. Peter Wheatley (PS009) [email protected]. Outline. Before Exoplanets Detecting exoplanets Direct imaging Reflex Motion of Star Transiting exoplanets Planet Formation Extra-Terrestial Life. Terrestrial planets. Gas giants. Ice giants. Asteroid belt. - PowerPoint PPT PresentationTRANSCRIPT
Peter Wheatley (PS009)[email protected]
PX437 EXOPLANETS
PX437 EXOPLANETS
Outline
1. Before Exoplanets
2. Detecting exoplanets1. Direct imaging2. Reflex Motion of Star3. Transiting exoplanets
3. Planet Formation
4. Extra-Terrestial Life
PX437 EXOPLANETS
IAU
Terrestrial planets Gas giants
Ice giants
Asteroid belt Kuiper belt
PX437 EXOPLANETS
Ceres: dwarf planet
HST
Planets, dwarf planets, small solar-system bodies
Typical asteroid:small solar-system body
PX437 EXOPLANETSEvolutionary tracks
Burrows et al. 1997, ApJ 491, 856
Saturn
Jupiter
Planets
Browndwarfs
Stars
PX437 EXOPLANETS
Stevenson 1982 AREPS 10, 257
Composition of the giant planets
PX437 EXOPLANETS
Stephen Oxley
Tidal model
PX437 EXOPLANETS
Discovery of debris around Vega
Aumann et al. 1984, ApJL 278, 23
IRAS observation:
Temperature ~ 85 K
Extent ~ 20 arcsec ~ 85 AU
Observed IR spectrum with 10,000 K black body subtracted
PX437 EXOPLANETS
PX437 EXOPLANETS
Imaging of the debris disc around beta Pictoris
Smith & Terrile 1984, Science 266, 1421
HST
PX437 EXOPLANETSProtoplanetary discs in Orion with HST
McCaughrean & O’Dell 1996 AJ 111, 1977
PX437 EXOPLANETS
PX437 EXOPLANETS
CaII
FeII
MgII
Debris discs around white dwarf stars
Gaensicke et al. 2006, Science 314, 1908
PX437 EXOPLANETS
Rin 0.7R
Rout 1.2R
e 0.02
Debris discs around white dwarf stars
PX437 EXOPLANETS
Rin 0.7R
Rout 1.2R
e 0.02
Debris discs around white dwarf stars
PX437 EXOPLANETS
Rin 0.7R
Rout 1.2R
e 0.02
Debris discs around white dwarf stars